Why our sleep experts loved it
Today we're taking a closer look at the M&S Collection 2500 Luxury British Wool Pocket Spring Medium Mattress. A new product from M&S that makes you feel supported and cushioned at the same time. The wool-top quilt adds a layer of plushness without letting you sink in too deeply. It’s medium-firm: not a rock, not a cloud—just right for most sleepers. Each of the pocket springs works independently, so pressure points at the shoulders and hips are eased. The overall effect is a balanced mix of comfort and support that invites a good night’s sleep.
Support and Spinal Alignment The pocket springs team up to hold you in good alignment. As you lie down, each coil reacts to your weight, distributing pressure evenly. I found my lower back was neither sunken nor overly arched—just naturally supported. The medium feel means a stable base without feeling like it’s pushing back too hard. It’s like the mattress and your body share the load, so I woke up with my spine feeling neutral and supported.
Suitability for Different Sleep Positions Side Sleepers: The wool quilt gives nice cushioning at shoulders and hips, so many side-sleepers should be comfortable (though very broad-shouldered or heavy people may want extra padding).Back Sleepers: Your spine stays neutral on this bed. The medium support and high spring count keep hips and lower back aligned without sinking.Stomach Sleepers: It’s in the middle ground for firmness. Many average-weight front sleepers will be fine, but very heavy stomach-sleepers might feel their hips dip a bit and could prefer something firmer.Combination Sleepers: Changing positions was smooth. With 2,500 pocket coils responding independently, the support felt consistent whether lying on side, back or front. Motion Isolation Motion transfer is impressively low thanks to the pocket springs. If one person moves or tosses on the bed, the other barely feels it. In tests a glass of water stayed mostly still even when I hopped on the opposite side. It’s not quite as still as memory foam, but much better than an old coil bed. Couples will appreciate that they have their own undisturbed sleep zones. (Even my cat napped peacefully through the trials.)
Temperature Regulation and Breathability The wool layers make this mattress very breathable and less likely to trap heat. I stayed comfortable even on warm nights: the wool wicks moisture and the cotton and vents let air circulate. It definitely felt cooler than typical memory foam. Wool is also naturally antibacterial and dust-mite resistant, so the surface stays fresh and dry. Overall it’s an excellent pick if you tend to run hot at night.
No more waking up in a puddle of sweat - this bed keeps nights fresh.
Materials and Construction This has a classic pocket-sprung build with natural upholstery. Up to 2,500 pocket coils (in a king) form the core, each in its own fabric sleeve, topped by layers of British wool and cotton. The quilted cover is well-made and edged with neat piping. Four handles and four air vents help with moving and airflow. It’s a one-sided design (no flipping), and comes with a 10-year guarantee. The wool is naturally antibacterial, and M&S notes the mattress has anti-allergy properties to reduce dust mites. In short, there’s no cheap memory foam or stuffing here - just quality springs and natural fibres.
Durability and Long-Term Use With its sturdy springs and wool layers, this mattress feels built to last. The high coil count spreads your weight out, so it shouldn't develop obvious sagging spots. It stayed firm during testing and comes with a 10-year guarantee, which suggests it’s expected to hold up. Rotating it every few months will keep wear even. Over the years, very heavy sleepers might notice a bit more sinkage in the hips, but overall it seems engineered to provide lasting comfort and support.
Ease of Setup and Use Setting up is straightforward. The mattress is delivered to your home (for a fee), and M&S can even place it in the room of your choice. It’s heavy (around 39kg for a king), but four handles make it easier to carry onto the bed frame. After unwrapping, give it time to settle into full thickness. If it comes vacuum-packed, expect it to plump up over a few hours. There’s no assembly or break-in needed - just remove all packaging and lie down. It’s one-sided (no flipping), though rotating it every few months can help even out wear. Otherwise, it behaves like any quality sprung mattress: low maintenance and ready to enjoy.
Value for Money At roughly £649 (double) / £749 (king) list price, it’s not a budget option. However, with 2,500 springs, British wool layers, and a 10-year guarantee, it feels fair for a mid-range luxury bed. Many customers grab it on sale, which makes it a great deal. In testing I found its comfort and support on par with some pricier models. If you value high-quality materials and longevity, the price seems justified. Those on a tight budget might wait for a sale or choose a simpler mattress, but you’ll be missing out on the benefits of wool and quality springs.
Ideal For Side and Back Sleepers: The medium support and wool cushioning keep these sleepers comfortable and well-aligned.Couples: Independent springs mean partner movement causes almost no ripple, so each person sleeps undisturbed.Hot Sleepers: Breathable wool and vents help keep the mattress cool on warm nights.Long-Term Planners: With solid UK construction and a 10-year guarantee, it’s built to last for many years. Not Ideal For Dedicated Stomach Sleepers: Very heavy front-sleepers might prefer a firmer mattress to keep hips from sinking.Budget Shoppers: It’s more expensive than basic models, so those on a tight budget may opt for cheaper beds (though you’d sacrifice spring and wool quality).Fans of Ultra-Plush Softness: If you crave a sinking, cloud-like feel, this medium-firm mattress may seem too firm without an added topper. Overall, the M&S 2500 Luxury British Wool Pocket Spring mattress is a strong choice for those fitting the “Ideal” profile above, offering a blend of natural comfort and reliable support. It may not suit everyone, but for its target sleepers it delivers on its promise of luxury and quality.
Why you can trust WantMattress
We spend hours testing (and/or researching) every product or service we review, so you can be sure you’re buying the best. Find out more about
how we test .
